seligman



July 16, 1963 J. w. SELIGMAN 3, 7

SHARPENER Filed NOV. 17, 1961 INVENTOR.

My M $LIGMAN ,q rrogwEYS United States Patent 3,097,457 SHARPENER Jay William Seligman, Brooklyn, N.Y., assignor to Lillian Freyer, Great Neck, N.Y. Filed Nov. 17, 1961, Ser. No. 152,994 1 Claim. (Cl. 51-246) This invention relates to a honer which is useful for sharpening various guillotine type cutters.

The guillotine type cutters, particularly those used for paper cutting, require an occasional sharpening. It would be hazardous for the operator to manipulate by hand the abrasive stone in the sharpening of the knife blade. Further, it is difficult for the operator to hold the abrasive stone in a constant angle as it is passed across the length of the knife edge to achieve satisfactory sharpening. These factors point to the need of an instrument to be used in place of such manual sharpening.

In revei-wing the requirements for a honing instrument, it is essential for widespread application that it be low enough in price to be consistent with effective performance. This places the honer in the category of being one that could be manually operated with a high degree of accuracy, and substantially free of any serious risks to the operator. Usually during the sharpening operation the honer may need adjustment as to the angle at which the abrasive stone is positioned. This should be done in an easy and convenient manner, othenwise diflic-ult adjustment may detract from its commercial potential. It has been found that the adjustment means should be far enough from the knife blade being sharpened to be safe but close enough to the operators hand to be convenient for use.

Accordingly, an object of this invention is to provide a honer which can be operated easily and effectively.

Another object of this invention is to provide an apparatus for honing guillotine type cutters which can be easily and safely adjusted as to the angle at which the abrasive stone is positioned.

Other objects and advantages of this invention will become apparent from the following description and explanation thereof.

The invention will now be explained by reference to the accompanying drawing wherein:

FIGURE :1 is an isometric view of the honer;

FIGURE 2 is an end view of the honer taken along lines 22, to illustrate the adjustment mechanism; and

FIGURE 3 is a rear view of the honer, taken along lines 3-3, to illustrate further the adjustment mechanism.

-In the drawings, the abrasive stone 5 is held within a U-shaped stone holder 6 with its sharpening face 7 protruding sufiiciently from the holder to provide easy engagement with the "knife blade to be sharpened. The stone 5 is held in place within the holder 6 by means of set screws 8 and 9. The stone holder 6 is connected integrally to anchor pin supports 11 and 12 which project upwardly from the holder 6 and are horizontal spaced from each other. Each anchor pin support contains an opening in which one end of the anchor pin 13 is supported. The pin suports 11 and 12 are also integrally connected with a bearing 14. The bearing 14 projects outwardly from the holder 6 at a 90 angle from the plane of projection of the pin supports 11 and 12.

The honer is supported on a fiat base 16. The base 16 carries a shaft support assembly which comprises shaft end supports 18 and -19 for a main shaft 20. The shaft end supports 18 and 19 each are integrally formed with vertical webs 21 and 22 respectively. The web supports extend across the top of the base 16 to the front of the honer at a height which diminishes gradually to give a graceful appearance. The webs are integrally formed with the base 18. Connected to the shaft end supports 18 and 19 and to their respective webs 21 and 22 are adjustment pin arms 23 and 24. The adjustment pin arms 23 and 24 project obliquely over the webs 21 and 22 and place the adjustment pin 26 which is supported therein in alignment with the anchor pin 13. The shaft end supports I18 and '19 and the adjustment pin arms 23 and 24 are spaced from each other at a distance suflicient to accommodate the positioning of the bearing 14- of the stone holder 6 between them. The main shaft 20 has the bearing 14 rotatably mounted on it at a position intermediate of the shaft end supports 18 and 19.

The adjustment pin contains at its middle portion a threaded opening in which is engaged an adjustment screw 28. The adjustment screw contains a knob 29 for handling by the operator in adjusting the honer stone. The other end of the adjustment screw 28 is not threaded and is supported in an opening at the middle of the anchor pin 13'. The adjustment screw 2-8 carries fixed washers 30 and 31 on each side of the anchor pin to prevent sliding of the adjustment screw 28 within the opening of the anchor pin. The honer is operated manually through a knurled handle 35 which is positioned at about the same height as the adjustment pin 26. The handle 35 is held in a horizontal plane parallel to the abrasive stone 5 by means of support members 36 and 37 which are connected at each end of the main shaft 20.

The adjustment 'knob 29 is situated forwardly of the handle 35 but back enough from the abrasive stone 5 to prevent accidents fromoccurring to the operator. During the sharpening operation the operator may desire to make an adjustment in the angle of the stone 5. This could happen at a time when the operator does not want to remove the honer from the blade site to efiect the adjustment. If the adjustment knob were located at the top of the honer close to the stone 5 a slip on the part of the operator during the adjustment could be serious. With the embodiment of the present invention, a slip would have no such result.

From the description given above of the honer, it can be seen that the main shaft 20 is non-rotatable and that the bearing 19 of the stone holder 6 is capable of rotation on it. Thus upon turning the adjustment screw 28, it advances forward or backward moving the stone holder with it during such movement. In this way the angle at which the stone 5 is positioned may be varied.

I claim:

A honer for honing an edge on a blade, said honer comprising: a base; support means on said base; a nonrotating shaft supported by said support means; an adjustment pin rotatably supported by said support means and having an axis substantially parallel to the axis of said shaft and having in addition a threaded hole extending through said pin perpendicular to the axis thereof; a bearing rotatably mounted on said shaft; clamping means attached to said bearing; an abrasive stone held in said clamping means and extending parallel to said axis of said shaft; a handle; means for connecting said handle to said shaft whereby said shaft is between said abrasive stone and said handle; an anchor pin rotatably attached to said bearing; a threaded shaft threaded to said threaded hole in said adjustment pin; means on said threaded shaft engaging said anchor pin to cause said anchor pin to move with said threaded shaft; and a knob fixedly attached to said threaded shaft and located between said adjustment pin and said handle whereby rotation of said knob moves said threaded shaft along its own axis and rotates said bearing together with said abrasive stone about said firstmentioned shaft.

References Cited in the file of this patent UNITED STATES PATENTS Bush Oct. 25, 1898 Chaney Nov. 28, 1911 Hohnhorst et a1 J an. 12, 1932 Chateauneuf May 8, 19 34 Sunn'en Aug. 25, 1953 Buttke May 14, 1957 Zernov et a1 July 4, 196 1 Fermskog Nov. 13, 1962 

